Lock for fire-arms



(No Model.)

G. W. MGGLINTOCK.

LOCK FQR FIRE ARMS.

No. 430,396. Patented June 17. 1890.

WIT E5555- .UNITED STATES PATENT OFFICE.

GEORGE V. MCGLINTOCK, OF QUINCY, ASSIGNOR OF ONE-HALF TO MELLEN N. BRAY, OF BROOKLINE, MASSACHUSETTS.

LOCK FOR FIRE-ARMS.

SPECIFICATTON forming part of Letters Patent No. 430,396, dated June 1'7, 1890.

Application filed July 11, 1889. Serial No. 317,182. (No model.)

To all whom it may concern:

Be it known that l, GEORGE \V. MOOLIN- TOCK, of Quincy,in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in Looks for Fire-Arms, of which the following is a specification.

My invention relates to looks for self-cocking firearms; and my improvements consist substantially in automatic mechanism which will immediately recock the hammer as soon as the pressure on the trigger has been relieved by continuously bearing down upon the mainspring which engages with said hammer, and also a trigger for first causing the tension of the mainspring and then releasing the sear from the hammer, thus allowing the mainspring also to be released and to force the hammer forward; and my improvements also consist in certain details of construction, as more particularly hereinafter described.

In the accompanying drawings, Figure 1 is an elevation of my improved lock, showing it in its normal condition and with the hammer cocked. Fig. 2 is a similar view showing the position of the parts just before the hammer is released from its sear. Fig. 3 shows the position of the parts after the hammer has been released from its sear and thrown forward by its mainspring. Fig. 4t represents a detail in perspective of the mechanism for causing the tension of the mainspring, and Fig. 5 is a section taken through the line :1: 0c of Fig. 3 and looking backward.

Similar letters represent like parts in all the figures.

A is the plate upon which the mechanism of the lock is supported.

Bis the hammer, which is pivoted 'to the 0 plate A near its front end, and C is the mainspring, which is pivoted near the rear end of said plate, and with its free and forward end a engaging with a recess 1) in the lower end of the hammer.

D is an auxiliary spring secured above the mainspring O and adapted to bear constantly upon the same, thus forcing said spring down and the hammer back as long as there is no impediment to prevent.

E is a spring-lever pivoted below the hammer B, and which constitutes the sear for said hammer, the forward end 0 of said sear being adapted to engage with a small notch (Z in the hammer B, so as to lock the latter in a cocked position. The tension-spring eof the sear E tends always to force the latter against the hammer.

. F is the trigger, which is pivoted near the bottom of the plate A in such a position that the rear arm f of the searE will rest upon the top' convex surface g of said trigger. The rear surface it of the trigger, at its upper portion, is somewhat concave, for a purpose here inafter to be described.

G is an elbow-arnnwhich is pivoted. near one end below the mainspring C. This arm extends along under said spring, and then extends down until its lower free end'i bears against or nearly bears'against the convex surface h of the trigger. 7o

When the trigger F is pulled back, the curved surface h acts like a cam on the end i of the arm G, which will ride upon said surface, and the elbow 7t of said arm will bear against and cause the tension to the 'mainspring 0. In order that the end 2' and elbow is may ride easily over the surface h of the trigger and the mainspring C, respectively, and with as little friction as possible, I have supplied said end and elbow with rollers Z.

The lock is operated as follows: The position of the parts being in their normal condition, as shown in Fig. 1that is, the spring D has forced down the spring 0 and consequently drawn back the hammer B until it is locked by its springsearE. The rear arm f of said sear is resting upon the upper convex surface g of the trigger, and the lower end 2' and the elbow k of the arm G are resting, respectively, on the curved surface h of the trigger and the lower surface of the mainspring C. Then,when the trigger F is drawn back, it will first raise the elbow-arm G, forcing it against the mainspring 0, thus causing the tension of the same, and then, while 5 increasing the tension of said'spring, it will raise the rear arm f of the sear, so as to release the forward end 0 of the latter from the notch dof the hammer, (see Fig. 2,) when,said hammer being unlocked, the spring 0 will be I00 released and force the hammer forward, as shown in Fig. 3. As soon as the pressure on the trigger is relieved the spring D will immediately force the spring 0 down and the parts will again assume the positions shown in Fig. 1.

By making the hammer-operating spring in two parts viz., the mainspring G and the auxiliary spring D, said springs being independent pieces-I do not only reduce the liability of breakage, but also am enabled to conveniently and cheaply replace the spring in case it or either of its parts is broken. The mainspring C is simplya strip of metal which is secured by a screw D to a pivoted arm or holder D.

I 'claim 1. In an automatic self-cocking lock for fire-arms, the combination of the hammer, a mainsprin g situated back of said hammer and engaging with the same, an auxiliary spring situated above the mainspring and continuously bearing down on said mainspring, a pivotal arm and trigger situated below the mainspring, with the latter bearing upon the pivotal arm and adapted to raise the mainspring through the intermediation of said arm, all substantially as shown, and operating as described.

2. The combination of the hammer having a recess in its rear side,a pivoted mainspring situated back of said hammer and with its free end engaging in the recess of the same, an auxiliary spring situated above the mainspring and automatically forcing down said mainspring and thereby drawing back the hammer, a pivotal arm and'trigger situated below the mainspring,with the latter bearing upon the pivotal arm and adapted to raise the mainspring through the intermediation of said arm, substantially as shown and described.

3. In combination with the hammer and a mainsprin g situated back of said ham mer and engaging with the same, an auxiliary spring situated above the mainspring and continuously bearing down on the same, the sear for locking the hammer by engaging in a notch of said hammer, and a pivotal arm and trigger situated below, the mainspring, with the latter bearing upon the pivotal arm and sear and adapted to raise the mainspring, through the intermediation of said arm and to release the sear from the hammer, all substantially as shown and described.

4. In combination with the hammer having the notches l and d, a mainspring engaging with the notch b, the sear E for engaging with the notch d,'a pivotal arm situated below the mainspring and adapted to bear the same upward, andthe trigger for raising said pivotal arm, and having the upper convex surface, on which the rear arm of the sear bears, substantially as shown, and for the purposes described.

5. In combination with the hammer, a mainspring situated back of the hammer and engaging with the same, the pivoted elbow-arm G, with its elbow bearing against said spring, and the trigger having the concave surface h, upon which the free end of said elbow-arm bears, all substantially as shown, and for the purposes described.

6. In combination with thehammer, a mainspring situated back of the hammer and engaging with the same, the arm G, having the rollers and Z, and the triggerhaving the concave surface 72,, with the roller Z bearing thereon, all combined and operating as described.

7. In combination with the hammer and a mainspring situated back of the hammer and engaging with the same, an auxiliary spring situated above the mainspring and continuously bearing down upon the same, the sear for engaging with a notch in the hammer, whereby said hammer may be looked, a pivotal arm situated below the mainspring and adapted to bear the same upward, and the trigger for raising said arm and having the convex upper surface g, with the rear arm of the sear bearing upon the same, all substantially as shown, and for the purposes described.

8. In combination with the hammer, a mainspring situated above said hammer and engaging with the same, the spring D, situated above the mainspring and bearing down upon the same, the sear E forengaging with the notch d, trigger F, having the surfaces 9 and h, with the rear arm of the sear resting on the surface g, and the elbow-arm G, pivoted to the frame, with its free end and elbow bearing, respectively, on the trigger and mainspring, all combined and operating in the manner described.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 29th day of June, A. D. 1889.

GEOR. w. MOCLINTOCK.

Witnesses:

O. F. BROWN, A. D. HARRISON. 

